James hill



l (udael.)

2 Sheets-Sheet 1.

HILL. Ja'panning Oven.

ATTORNEYS.

Patented Feb. 1,1881.

WITNESSES: wm

(nodal.) 2 sheets-sheet 2.

J. HILL. 4 Japannng Oven. 7 No. 237,183. Patented Feb. 1. 1&81.

vvfmsss: IN-VENTOR:

- l ATTORNEYS.

, UNITED STATES PATENT OFFICE.

VJAMES HILL, OF PROVIDENCE, RHODE ISLAND.

JAPANNING-OVEN.

SPECIFICATION forming part of Letters Patent No. 237,183, dated February 1, 1881.

` Application flledJuly 1,1880. (Model.)

vision is made for keeping up a uniform temperature of the air in the oven in which the japanued articles are placed for the purpose of baking them.

In the accompanying drawings, Figure'l is a transverse vertical sectional View of an lapparatus embodying my improvements. Fig. 2 is an end view. Fig.3 is a side view. Fig. 4 is a horizontal section taken ou line .fr x of Fig. Fig. 5 is a sectional view of the oven in side elevation, broken away on line y y of Fig. l, the pipes and cylinder being removed.

Similar letters of reference indicate correspondin g parts.

A represents the furnace, in the lower portion of which is the nre-place B, provided with au arched roof or top, (l. Inside of the furnaceof these series of pipes are perforated toward the inside of the oven.

At about the center of the oven is a cylinder, K, in which works a piston, L, provided with a valve opening upward. The pistonrod Z works through a stuffing-box or packin g in -the top of the cylinder, and is connected to the inner end of a beam, i, which extends outside of the furnace, and has its outer end connected with a crank or other suitable device for oscillating it. The cylinder K communicates by a pipe, M, with the transverse pipe J. and by a pipe, M2, with-the transverse pipe J2.

As the piston L rises and falls, operated by the beam t', the air is drawn downward through the pipe M and forced downward through the pipe M2, and a continuous current of hot air is kept up through the perforations in the pipes H and H2 and through the oven., as indicated by the arrows in Fig. 1, so as to keep the temperature ofthe interior of the oven at a uniform degree and thoroughly bake the japanned ware suspended therein without blistering, warping, or caking thevarnish thereon.

The oven may be furnished with fresh air through Lshaped passages M3, extending into `the oven 4from the top of the furnace, as shown in Figs. 3 and 5 of drawings.

In Fig. 2 a rack, M4, for holding the article M5 t0 be dried is shown. Any suitable or desired device, however, may be used in place of the rack shown, the object merely being to properly hold the article while being dried.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-' The combination, with the oven D and the pipes J J2 and BH2, of the pipes M M2, cylinder K, and piston L, as shown-and described, for the purpose specied.

JAMES HILL. 

